X0609 4 2026-06-03 0001943896 Rubrik, Inc. RBRK 0001340472 Herren Richard Scott false C/O RUBRIK INC. 3495 DEER CREEK ROAD PALO ALTO CA 94304 true false false false 0 Class A Common Stock 2026-06-03 4 A 0 3709 0 A 7461 D Represents the grant of restricted stock units ("RSUs") that will vest over a one-year period, in four (4) successive equal quarterly installments on each of September 15, 2026, December 15, 2026, March 15, 2027 and June 15, 2027, subject to the reporting person's continuous service with the Issuer on each such vest date. /s/ Larry Guo, Attorney-in-Fact 2026-06-03